SYSTEM VIEW · System view
pg_group
The view pg_group exists for backwards compatibility: it emulates a catalog that existed in PostgreSQL before version 8.1. It shows the names and members of all roles that are marked as not rolcanlogin, which is an approximation to the set of roles that are being used as groups.
Checked column by column against a PostgreSQL 18.6 instance · Raw measurement record ↗
Columns PostgreSQL 18
pg_group| COLUMN | TYPE | DESCRIPTION |
|---|---|---|
groname |
name |
Name of the groupReferences:pg_authid.rolname |
grosysid |
oid |
ID of this groupReferences:pg_authid.oid |
grolist |
oid[] |
An array containing the IDs of the roles in this groupReferences:pg_authid.oid |
Columns marked "implicit" are not included in SELECT *; some early statistics views are completed from same-version source, and the extra provenance is shown in the column description.
Common system columns 0
System attributes PostgreSQL provides, normally not expanded by SELECT *. Kept separately so they are not mixed in with ordinary columns.
| Columns | Type | attnum |
|---|
Column evolution matrix
Hover a cell for the column type9.0 is the coverage baseline; a column already present in the baseline is not marked as added. The matrix aligns columns by name, so a rename appears as the old column removed and a new column added.
Evolution timeline
Changes between adjacent majorsNo column-structure or description change between the covered versions.
Compare any two versions
Pick two versions to see added, removed, and retyped columns. The interactive comparison needs JavaScript; the evolution timeline reads fine without it.